Concordance of nuclear and mitochondrial DNA markers in detecting a founder event in Lake Clark sockeye salmon
Kristina M. Ramstad, Carol Ann Woody, Chris Habicht, G. Kevin Sage, James E. Seeb, Fred W. Allendorf
2007, American Fisheries Society Symposium (54) 31-50
Genetic bottleneck effects can reduce genetic variation, persistence probability, and evolutionary potential of populations. Previous microsatellite analysis suggested a bottleneck associated with a common founding of sock-eye salmon Oncorhynchus nerka populations of Lake Clark, Alaska, about 100 to 400 generations ago. The common foundingevent occurred after the last glacial recession...
Assessment of marine-derived nutrients in the Copper River Delta, Alaska, using natural abundance of the stable isotopes of nitrogen, sulfur, and carbon
Thomas C. Kline, Carol Ann Woody, Mary Anne Bishop, Sean P. Powers, E. Eric Knudsen
2007, American Fisheries Society Symposium (54) 51-60
We performed nitrogen, sulfur, and carbon stable isotope analysis (SIA) on maturing and juvenile anadromous sockeye and coho salmon, and periphyton in two Copper River delta watersheds of Alaska to trace salmonderived nutrients during 2003–2004. Maturing salmon were isotopically enriched relative to alternate freshwater N, S, and C sources as...
Latitudinal variation in population structure of wintering Pacific Black Brant
J.L. Schamber, James S. Sedinger, David H. Ward, K.R. Hagmeier
2007, Journal of Field Ornithology (78) 74-82
Latitudinal variation in population structure during the winter has been reported in many migratory birds, but has been documented in few species of waterfowl. Variation in environmental and social conditions at wintering sites can potentially influence the population dynamics of differential migrants. We examined latitudinal variation in sex and age...
Slightly weathered Exxon Valdez oil persists in Gulf of Alaska beach sediments after 16 years
J.W. Short, G.V. Irvine, D.H. Mann, J.M. Maselko, J.J. Pella, M.R. Lindeberg, J. R. Payne, W.B. Driskell, S.D. Rice
2007, Environmental Science & Technology (41) 1245-1250
Oil stranded by the 1989 Exxon Valdez spill has persisted in subsurface sediments of exposed shores for 16 years. With annualized loss rates declining from ∼68% yr-1 prior to 1992 to ∼4% yr-1 after 2001, weathering processes are retarded in both sediments and residual emulsified oil (“oil mousse”), and retention of toxic polycyclic aromatic...
Spatial distribution of juvenile and adult female Tanner crabs (Chionoecetes bairdi) in a glacial fjord ecosystem: Implications for recruitment processes
J.K. Nielsen, S. James Taggart, Thomas C. Shirley, Jennifer Mondragon
2007, ICES Journal of Marine Science (64) 1772-1784
A systematic pot survey in Glacier Bay, Alaska, was conducted to characterize the spatial distribution of juvenile and adult female Tanner crabs, and their association with depth and temperature. The information was used to infer important recruitment processes for Tanner crabs in glaciated ecosystems. High-catch areas for juvenile and adult...
Influence of disturbance on carbon exchange in a permafrost collapse and adjacent burned forest
I. H. Myers-Smith, A. D. McGuire, J.W. Harden, F. S. Chapin III
2007, Journal of Geophysical Research G: Biogeosciences (112)
We measured CO2 and CH4 exchange from the center of a Sphagnum‐dominated permafrost collapse, through an aquatic moat, and into a recently burned black spruce forest on the Tanana River floodplain in interior Alaska. In the anomalously dry growing season of 2004, both the collapse and the surrounding burned area were net sinks...
Escape tectonics and the extrusion of Alaska: Past, present, and future
T.F. Redfield, D.W. Scholl, P.G. Fitzgerald, M. E. Beck Jr.
2007, Geology (35) 1039-1042
The North Pacific Rim is a tectonically active plate boundary zone parts of which may be characterized as a laterally moving orogenic stream. Crustal blocks are transported along large-magnitude strike-slip faults in western Canada and central Alaska toward the Aleutian-Bering Sea subduction zones. Throughout much of the Cenozoic, at and...
Using a bioenergetic model to assess growth reduction from catch-and-release fishing and hooking injury in rainbow trout, Oncorhynchus mykiss
Julie M. Meka, F.J. Margraf
2007, Fisheries Management and Ecology (14) 131-139
A bioenergetic model was used to predict the potential effects of feeding cessation caused by catch-and-release capture and a reduction in feeding efficiency from hooking injuries on rainbow trout, Oncorhynchus mykiss (Walbaum), growth in southwest Alaska, USA. Simulations indicated that a 1-day feeding cessation for a rainbow trout captured one to two...
Major and Trace-Element Data from Stream-Sediment and Rock Samples Collected in the Taylor Mountains 1:250,000-Scale Quadrangle, Alaska
Elizabeth A. Bailey, Gregory K. Lee, Seth H. Mueller, Bronwen Wang, Zoe Ann Brown, Greg A. Beischer
2007, Open-File Report 2007-1196
In the summers of 2004, 2005, and 2006, the U.S. Geological Survey conducted a reconnaissance geochemical survey of the drainage basins throughout most of the Taylor Mountains 1:250,000-scale quadrangle, in southwestern Alaska. The purpose of the study was to locate areas of potential interest for ore minerals, provide data that...
Glacier changes in southeast Alaska and northwest British Columbia and contribution to sea level rise
C.F. Larsen, R.J. Motyka, A.A. Arendt, K.A. Echelmeyer, P.E. Geissler
2007, Journal of Geophysical Research F: Earth Surface (112)
The digital elevation model (DEM) from the 2000 Shuttle Radar Topography Mission (SRTM) was differenced from a composite DEM based on air photos dating from 1948 to 1987 to detennine glacier volume changes in southeast Alaska and adjoining Canada. SRTM accuracy was assessed at ??5 in through comparison with airborne...
Intertidal sand body migration along a megatidal coast, Kachemak Bay, Alaska
P.N. Adams, P. Ruggiero, G.C. Schoch, G. Gelfenbaum
2007, Journal of Geophysical Research F: Earth Surface (112)
[1] Using a digital video-based Argus Beach Monitoring System (ABMS) on the north shore of Kachemak Bay in south central Alaska, we document the timing and magnitude of alongshore migration of intertidal sand bed forms over a cobble substrate during a 22-month observation period. Two...
Recovery of three arctic stream reaches from experimental nutrient enrichment
J.P. Benstead, A.C. Green, Linda A. Deegan, B. J. Peterson, K. Slavik, W.B. Bowden, A.E. Hershey
2007, Freshwater Biology (52) 1077-1089
1. Nutrient enrichment and resulting eutrophication is a widespread anthropogenic influence on freshwater ecosystems, but recovery from nutrient enrichment is poorly understood, especially in stream environments. We examined multi-year patterns in community recovery from experimental low-concentration nutrient enrichment (N + P or P only) in three reaches of two Arctic...
Identification of functional corridors with movement characteristics of brown bears on the Kenai Peninsula, Alaska
T.A. Graves, S. Farley, M.I. Goldstein, C. Servheen
2007, Landscape Ecology (22) 765-772
We identified primary habitat and functional corridors across a landscape using Global Positioning System (GPS) collar locations of brown bears (Ursus arctos). After deriving density, speed, and angular deviation of movement, we classified landscape function for a group of animals with a cluster analysis. We described areas with high amounts...
Winter movement dynamics of black brant
Mark S. Lindberg, David H. Ward, T. Lee Tibbitts, John Roser
2007, Journal of Wildlife Management (71) 534-540
Although North American geese are managed based on their breeding distributions, the dynamics of those breeding populations may be affected by events that occur during the winter. Birth rates of capital breeding geese may be influenced by wintering conditions, mortality may be influenced by timing of migration and wintering distribution,...
The blind men and the elephant: Concerns about the use of juvenile proportion data
Brian J. McCaffery, Colleen M. Handel, Robert E. Gill Jr., Daniel R. Ruthrauff
2007, Stilt - The journal for the East Asian-Australasian Flyway (50) 194-204
Juvenile proportion data in shorebirds are being used with increasing frequency to estimate recruitment and even breeding success. Although this area of investigation holds great promise, flaws in current study designs preclude great confidence in the broad-scale inferences being drawn. We present data from our own investigations on juvenile proportions...
Distribution of breeding shorebirds on the Arctic Coastal Plain of Alaska
James A. Johnson, Richard B. Lanctot, Brad A. Andres, Jonathan Bart, Stephen C. Brown, Steven J. Kendall, David C. Payer
2007, Arctic (60) 277-293
Available information on the distribution of breeding shorebirds across the Arctic Coastal Plain of Alaska is dated, fragmented, and limited in scope. Herein, we describe the distribution of 19 shorebird species from data gathered at 407 study plots between 1998 and 2004. This information was collected using a single-visit rapid...
Crustal structure of Wrangellia and adjacent terranes inferred from geophysical studies along a transect through the northern Talkeetna Mountains
J.M.G. Glen, J. Schmidt, L. Pellerin, D.K. McPhee, J.M. O’Neill
2007, Special Paper of the Geological Society of America 21-41
Recent investigations of the Talkeetna Mountains in south-central Alaska were undertaken to study the region's framework geophysics and to reinterpret structures and crustal composition. Potential field (gravity and magnetic) and magnetotelluric (MT) data were collected along northwest-trending profiles as part of the U.S. Geological Survey's Talkeetna Mountains transect project. The...
Moult migration of emperor geese Chen canagica between Alaska and Russia
Jerry W. Hupp, Joel A. Schmutz, Craig R. Ely, E.E. Syroechkovskiy Jr., Alexander V. Kondratyev, W.D. Eldridge, E. Lappo
2007, Journal of Avian Biology (38) 462-470
We studied reproductive success and post-breeding movements of 32 adult female emperor geese Chen canagica that were marked with satellite radio transmitters on their nesting area on the Yukon-Kuskokwim Delta (YKD), Alaska 2000–2004. All 16 females that failed to successfully reproduce departed the YKD and moulted remiges either on the north coast...
Weirs: Counting and sampling adult salmonids in streams and rivers
Christian E. Zimmerman, Laura M. Zabkar
2007, Book chapter, Salmonid field protocols handbook: techniques for assessing status and trends in salmon and trout populations.
Weirs—which function as porous barriers built across stream—have long been used to capture migrating fish in flowing waters. For example, the Netsilik peoples of northern Canada used V-shaped weirs constructed of river rocks gathered onsite to capture migrating Arctic char Salvelinus alpinus (Balikci 1970). Similarly, fences constructed of stakes and...
Strategies for survival: Marine mammals
Sara J. Iverson, Alan M. Springer, James L. Bodkin
Robert B. Spies, editor(s)
2007, Book chapter, Long-term ecological change in the northern Gulf of Alaska
No abstract available....
Strategies for survival: Stellar sea lions, harbor seals and sea otters Chapter 4.9
Alan M. Springer, Sara J. Iverson, James L. Bodkin
Robert B. Spies, editor(s)
2007, Book chapter, Long-Term Ecological Change in the Northern Gulf of Alaska
Dynamic in-lake spawning migrations by female sockeye salmon
Daniel Young, C.A. Woody
2007, Ecology of Freshwater Fish (16) 155-164
Precise homing by salmon to natal habitats is considered the primary mechanism in the evolution of population-specific traits, yet few studies have focused on this final phase of their spawning migration. We radio tagged 157 female sockeye salmon (Oncorhynchus nerka) as they entered Lake Clark, Alaska, and tracked them every...
Marine mammal populations
Alan M. Springer, Sara J. Iverson, James L. Bodkin
Robert B. Spies, editor(s)
2007, Book chapter, Long-term ecological change in the northern Gulf of Alaska
No abstract available....
Revisiting evolutionary dead ends in sockeye salmon ( Oncorhynchus nerka) life history
S.A. Pavey, T.R. Hamon, J.L. Nielsen
2007, Canadian Journal of Fisheries and Aquatic Sciences (64) 1199-1208
This study challenges recent hypotheses about sockeye salmon (Oncorhynchus nerka) colonization based on life history and broadens the pathways that investigators should consider when studying sockeye colonization of novel habitats. Most sockeye populations exhibit lake-type life histories. Riverine populations are thought to be more likely to stray from their natal...
Tower counts
Carol Ann Woody
2007, Book chapter, Salmonid Field Protocols Handbook: Techniques for Assessing Status and Trends in Salmon and Trout Populations
Counting towers provide an accurate, low-cost, low-maintenance, low-technology, and easily mobilized escapement estimation program compared to other methods (e.g., weirs, hydroacoustics, mark-recapture, and aerial surveys) (Thompson 1962; Siebel 1967; Cousens et al. 1982; Symons and Waldichuk 1984; Anderson 2000; Alaska Department of Fish and Game 2003). Counting tower data has...
